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Rechargeable battery having safety member

a technology of safety member and rechargeable battery, which is applied in the direction of batteries, wound/folded electrode electrodes, cell components, etc., can solve the problems of increased risk of ignition or explosion of rechargeable batteries, inability to recharge, and inability to recharge, so as to prevent the current flowing to other electrode assemblies

Inactive Publication Date: 2015-03-19
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a design for a rechargeable battery that prevents short circuits and ensures safe operation. The design includes two electrodes that are spaced apart in the battery, and a current collecting fuse between the two electrodes. This prevents current from flowing to other electrodes when a short circuit occurs in one electrode. Overall, this design provides a safer and more reliable rechargeable battery.

Problems solved by technology

A rechargeable battery differs from a primary battery in that it can be repeatedly recharged and discharged, while a primary battery is incapable of being recharged.
In situations where foreign conductive materials such as nails, metal tools like awls, or other similar conductive materials enter a rechargeable battery cell, a short circuit may occur inside the rechargeable battery as a result.
When the short circuit occurs, the internal temperature of the rechargeable battery may be abruptly increased resulting in an increased risk of ignition or explosion of the rechargeable battery.
This risk that a high-capacity rechargeable battery may ignite or explode is even further increased when the current flow is large due to an external short circuit.

Method used

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  • Rechargeable battery having safety member
  • Rechargeable battery having safety member
  • Rechargeable battery having safety member

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0038]FIG. 1 is a perspective view of a rechargeable battery and FIG. 2 is a cross-sectional view of the rechargeable battery of FIG. 1, taken along line II-II.

[0039]Referring to FIG. 1 and FIG. 2, the rechargeable battery 101 according to the first embodiment includes: first and second electrode assemblies 10 and 20 wound with a separator 13 between a negative electrode 11 and a positive electrode 12; a case 26 in which the first and second electrode assemblies 10 and 20 are stored; and a cap assembly 30 coupled to an opening of the case 26.

[0040]The rechargeable battery 101 according to the first embodiment may be a prism-shaped lithium ion rechargeable battery 101. However, the present invention is not limited thereto, and the rechargeable battery 101 can include various types of batteries such as a lithium polymer battery, or a cylindrical battery, etc., having various shapes.

[0041]According to an embodiment, the negative electrode 11 includes a coated region where a negative a...

second embodiment

[0107]FIG. 5 is an exploded perspective view of a safety member according to a

[0108]Because the rechargeable battery 101 according to the current embodiment has the same structure as the rechargeable battery 101 according to the first embodiment, except for a safety member 90, a repeated description of the same structure has been omitted. In addition, since the second safety member 80 has the same structure as the first safety member 90, a description of the second safety member 80 is replaced with that of the first safety member 90.

[0109]The first safety member 90 according to this embodiment includes a first conductive plate 91 between the first frontal sides 26b and the first electrode assembly 10, a second conductive plate 92 between the first frontal side 26b and the second electrode assembly 20, and a safety fuse 93 connecting the first and second conductive plates 91 and 92.

[0110]The first and second conductive plates 91 and 92 may be integrally formed with the safety fuse 93...

third embodiment

[0115]FIG. 6 is an exploded perspective view of a current collecting member, an electrode assembly, and a safety member of the rechargeable battery according to a

[0116]Because the rechargeable battery 101 according to the current embodiment has the same structure as the rechargeable battery 101 according to the first embodiment, except for an arrangement of electrode assemblies 10 and 20 and a structure of a safety member 140 or 150, a repeated description of the same structure has been omitted.

[0117]The rechargeable battery 101 according to the current embodiment includes electrode assemblies 10 and 20, current collecting members 121 and 132, and first and second safety members 140 and 150.

[0118]The first and second electrode assemblies 10 and 20 may be stacked in the first direction (z-axis direction) of the case 26. According to the embodiment of FIG. 6, the first electrode assembly 10 is located closer to the cap assembly 30 than the second electrode assembly 20, and the first a...

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Abstract

A rechargeable battery according includes a plurality of electrode assemblies including a first electrode assembly and a second electrode assembly, a case housing the plurality of electrode assemblies, a cap assembly coupled to the case, and a first safety member including a first conductive plate between the first electrode assembly and the case, a second conductive plate between the second electrode assembly and the case, and a safety fuse between the first conductive plate and the second conductive plate and coupling the first and second conductive plates together.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority to and the benefit of Korean Patent Application No. 10-2013-0112116 filed in the Korean Intellectual Property Office on Sep. 17, 2013, the entire contents of which are incorporated herein by reference.BACKGROUND[0002]1. Field[0003]An aspect of the present invention relates generally to a rechargeable battery.[0004]2. Description of the Related Art[0005]A rechargeable battery differs from a primary battery in that it can be repeatedly recharged and discharged, while a primary battery is incapable of being recharged.[0006]Low-capacity rechargeable batteries are often used in small portable electronic devices such as mobile phones, notebook computers, and camcorders, while high-capacity rechargeable batteries are widely used as a power source for larger electric devices, such as driving a motor of a hybrid vehicle, etc. Recently, high power rechargeable batteries using a non-aqueous electrolyte and having high...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H01M2/34H01M50/528H01M50/534H01M50/536H01M50/538H01M50/583
CPCH01M2/34H01M10/0431H01M2200/103Y02E60/10H01M50/528H01M50/538Y02P70/50H01M50/583H01M50/536H01M50/534H01M50/581H01M50/572
Inventor KIM, SEUNG-MOPARK, BONG-KYOUNGSOH, HYUNPARK, BYUNG-SUBFEYGENSON, NAUMLEE, CHAN-HOKIM, HYUN-CHUL
Owner SAMSUNG SDI CO LTD